Transmission device with a controlled viscous coupler, in partic

Details Transmission device with a controlled viscous coupler, in partic Transmission device with a controlled viscous coupler, in partic

1992-04-23

1994-05-10

Crowder, Clifford D.

Rotary shafts, gudgeons, housings, and flexible couplings for ro

Speed responsive device for adjusting relative rotational...

464 2, 464 3, 464 24, 192 58C, 192103R, 192 93A, 475231, F16D 310, F16D 2500

Patent

active

053103823

ABSTRACT:
The invention relates to a transmission device between two coaxial rotating members (1; 10), of the type comprising a viscous-fluid coupling (11) with a driving element and a driven element, and control devices for modifying the operating characteristic of this coupling. It is defined, in particular, in that the control devices are incorporated into the transmission device and act as a function of the rotational speed of one the said members and as a function of a torque transmitted by the device. The control devices can comprise flyweights (21) which are rotationally integral with the member (1) and with the case (12) of the viscous-fluid coupling, these flyweights acting to modify the internal pressure in the coupling (11), via shuttles (27) and a sliding sleeve (8) which is displaced as a function of the torque transmitted between the sun gear (2) and the output shaft (10). This sliding sleeve can, for example, act on a plate (16) which modifies the spacing between the disks (14, 15) of the coupling. Application, in particular, to four-wheel drive vehicles.

REFERENCES:
patent: 2387195 (1945-10-01), Tjaarda
patent: 2684743 (1954-07-01), Trofimov
patent: 2714946 (1955-08-01), Tenot
patent: 4757727 (1988-07-01), Teraoka et al.
patent: 4856637 (1989-08-01), Gebhart
patent: 5165506 (1992-11-01), Guimbretiere

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